New 9mm 445 diodes

Fiddy said:

9mm diode has 5 bond wires on the right and 4 on the left.

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The "extra" bond wire attaches to an SM component that serves as ESD protection

kiyoukan said:

what about H diodes?

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The H and the M diodes are the same diodes

Peace,
dave

I never thought a photo of a laser diode could be be inherently "gross"... until this:

/agree.

so both diodes have been opened up then and side by side looked at.
im thinking from now on i am going to stick with the 9mm diodes.
They should be much better as far as life is concerned.
Maybe well get that 20,000 hours. (LOL maybe just a few 1,000 would do.)

Good photo's. Try to get close as possible to the subject. Set the focus of the macro lens at the minimum and move the camera until it is tack sharp.

The light could be little better by adding a white sheet of paper to the other side of the subject. It will illuminate the dark shadows by reflecting the light from the lightsource.

rhd said:

I never thought a photo of a laser diode could be be inherently "gross"... until this:

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Someone was very excited tearing down that projector.

rhd said:

I never thought a photo of a laser diode could be be inherently "gross"... until this:

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M140DPP_0032 by tsteele93, on Flickr

LOL,

The goop was there when I got it. I wiped off enough to see the "barcode."

The red ink is because when I got it, I thought that I was getting an M140 and the 9mm so the other diode was a mystery diode to me.

I didn't realize it would be obvious which was which once I got them magnified, so I marked it with a red marker to make sure I didn't mix up two nearly identical diodes.

If one had been an M and the other was an H it might have been a good idea, but instead it looks like it was used in a (censored) with stirrups and (censored) at the (censored) (censored)!

Hope that was ok to post!

Blord said:

Good photo's. Try to get close as possible to the subject. Set the focus of the macro lens at the minimum and move the camera until it is tack sharp.

The light could be little better by adding a white sheet of paper to the other side of the subject. It will illuminate the dark shadows by reflecting the light from the lightsource.

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Blord, thanks for the tips. I was surprised I wasn't getting larger pics. I started with a 100mm macro, then added several of these Amazon.com: Kenko DG Auto Extension Tube Set for the Canon EOS AF Mount.: Camera & Photo until I had all three stacked for 68mm of extension tube on top of the 100mm.

I didn't want to do the 50mm reversed because of not wanting to get dust in the 50mm f/1.4 but I do have the 58/58 reverse coupler if that will work better.

I'm going to play more. Maybe I just wasn't getting close enough to the diodes and was taking these in "normal" portrait mode?

I have a decent manfrotto tripod, but it isn't very precise on vertical adjustment and I almost dropped the lens straight down on a diode at one point. I better put a uv filter or something on it to protect it. I almost never use a filter because I always have lens hoods and am careful and I hate to lose a stop and possibly put cheap glass in front of my L lens, but when you have a heavy camera/lens on a tripod aimed straight down towards the ground, it is a whole different world.

Thank you very much for the tips.

I want to re-iterate again - anyone wanting REALLY good macro, Blord is your man and if the time and slight extra expense of shipping something small like this to Europe are worth it for your project then please feel free to use him. Or if you are on that side of the pond and need good macro shots, he is the man!

I'm just offering to do this because I can turn it around fast in the US and send back cheaply to help out and I'm having fun learning to do macro better. But I don't want to step on his toes or do something that he would like to be doing. I DO very much appreciate your tips Blord.

kiyoukan said:

so both diodes have been opened up then and side by side looked at.

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Yes

Peace,
dave

One more note, I have a microscope here and I am going to TRY and get a shot of the ESD really close. Wish me luck!

Also... We got caught up in a cost discussion, but I was curious about these aspects as well.

Me! said:

2. For a 405nm or ~650nm burner, is this lens giving a better burning dot?

3. With 9mm packaging, won't heat sinking be better?

4. Why is the 4.8v such a big deal? I'm still working on understanding the circuits better, but is this a universal problem no matter which driver you use or will it affect some designs (buck/boost/linear) differently?

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tsteele93 said:

One more note, I have a microscope here and I am going to TRY and get a shot of the ESD really close. Wish me luck!

Also... We got caught up in a cost discussion, but I was curious about these aspects as well.

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The gentleman, to whom you will be shipping the diodes next, is doing microscopic photography of the diodes

You have a PM with the address

Peace,
dave

No problem,

I hope it is ok for me to post my microscope pics though? I took a bunch and I think a few turned out ok. I would love to see how his compare to mine and see if I can learn from them.

Dave has given me the ok to post my microscope pics. I was basically trying to get a good shot of the ESD. I have a whole folder of these if you want to look for something in particular. A lot of the pictures in the folder look like exact duplicates, but they are actually focused slightly different to try and examine a specific part of the diode. But it is not for the easily bored!

HERE is a link to the entire folder.

And here are a few select pics from the set. These were taken with a Canon 7D, 100mm f/2.8 L macro lens through a Bausch & Lomb microscope of unknown progeny. This is my setup...


DPP_0077 by tsteele93, on Flickr

Here are the closeups of the 9mm diode


DPP_0052 by tsteele93, on Flickr


DPP_0073 by tsteele93, on Flickr


DPP_0059 by tsteele93, on Flickr


DPP_0062 by tsteele93, on Flickr


DPP_0046 by tsteele93, on Flickr


DPP_0043 by tsteele93, on Flickr


DPP_0010 by tsteele93, on Flickr

Wow thats a nice setup and pics!

All hail the black box!

Anybody remember my diode microscope pics? I'd like to compare A, M, and 9mm with enough mag to measure ridge width. Any volunteers?

That is a good ridge you got there. Nice clear picture of the black box !

@Pullbangdead : Yes, I remember your pictures. A very small area of the laserdiode was giving light.

Blord said:

That is a good ridge you got there. Nice clear picture of the black box !

@Pullbangdead : Yes, I remember your pictures. A very small area of the laserdiode was giving light.

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Thanks Blord, I have a whole nother level of respect for you now. Those are tough to get!

pullbangdead said:

Anybody remember my diode microscope pics? I'd like to compare A, M, and 9mm with enough mag to measure ridge width. Any volunteers?

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I'd like to see them!